A description is given of Cyclone 30, a 30-MeV, H/sup -/ cyclotron for radioscope production, designed for extremely high extracted beam intensity (500 mu A) and low power consumption (less than 100 kW with a 15-kW extracted beam). The Cyclone 30 prototype has now been operational for years at Louvain-La-Neuve and has achieved all design goals while demonstrating very high reliability. The major events in its development are reviewed. The data gathered so far give general basic trends for future designs; a 70-MeV, 2-mA machine design study is presented.